CN114464843B - Humidification system and humidification method for hydrogen fuel cell - Google Patents
Humidification system and humidification method for hydrogen fuel cell Download PDFInfo
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- CN114464843B CN114464843B CN202210386602.XA CN202210386602A CN114464843B CN 114464843 B CN114464843 B CN 114464843B CN 202210386602 A CN202210386602 A CN 202210386602A CN 114464843 B CN114464843 B CN 114464843B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
- H01M8/04149—Humidifying by diffusion, e.g. making use of membranes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a hydrogen fuel cell humidification system and a humidification method, comprising a hydrogen fuel cell, a filter screen, a primary water storage tank, a coiled pipe and a secondary water storage tank, wherein the primary water storage tank is arranged below the hydrogen fuel cell, the primary water storage tank and the secondary water storage tank are sealed in the same shell, the filter screen is arranged between the primary water storage tank and the secondary water storage tank, and an ultrasonic humidifier is arranged in the primary water storage tank; the filtering holes of the filter screen are in an inverted frustum shape; the coil pipe is communicated between the bottom of the primary water storage tank and the bottom of the secondary water storage tank, and the highest point of the coil pipe exceeds the bottom of the primary water storage tank and is set to be high. The automatic water discharging of the hydrogen fuel cell and the automatic humidification of hydrogen entering the fuel cell can be realized, the oxidation-reduction reaction efficiency of the hydrogen fuel cell is promoted, and the high-efficiency operation of the hydrogen fuel cell is promoted.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to a hydrogen fuel cell humidifying system and a humidifying method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The hydrogen fuel cell works in such a way that hydrogen generates hydrogen ions and releases electrons under the action of an anode catalyst, the hydrogen ions pass through a proton exchange membrane to reach a cathode, and the electrons are collected by a current collecting plate and flow to the cathode from an external circuit; the air is reduced under the action of the cathode catalyst and is combined with hydrogen ions and external circuit electrons to generate water. The water produced is generally discharged as waste water.
On the one hand, proton exchange membranes require water to ensure good proton conductivity. The operating temperature of the fuel cell stack is about 80 ℃, so that the proton conductivity of the proton exchange membrane in the cell is greatly reduced due to water evaporation, the internal resistance of the cell is increased, and the dry proton exchange membrane is subjected to irreversible degradation, so that the humidification of the fuel cell membrane needs to be ensured. On the other hand, when the water inside the fuel cell is too much, the proton exchange membrane electrode is submerged, so that the gas cannot enter the catalytic layer, and the cell reaction is hindered, which is called flooding. At present, the balance of the water content of the proton exchange membrane cannot be realized, the conventional hydrogen humidification is realized by an additional water injection method, the waste of water resources is easily caused, and the humidification effect of the hydrogen is difficult to ensure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hydrogen fuel cell humidifying system and a humidifying method. The automatic water discharge of the hydrogen fuel cell and the automatic humidification of hydrogen entering the fuel cell can be realized, the oxidation-reduction reaction efficiency of the hydrogen fuel cell is promoted, and the high-efficiency operation of the hydrogen fuel cell is promoted.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a humidification system for a hydrogen fuel cell, comprising a hydrogen fuel cell, a filter screen, a primary water storage tank, a coil and a secondary water storage tank, wherein,
the primary water storage tank is arranged below the hydrogen fuel cell, the primary water storage tank and the hydrogen fuel cell are sealed in the same shell, the filter screen is arranged between the primary water storage tank and the hydrogen fuel cell, and the ultrasonic humidifier is arranged in the primary water storage tank;
the filtering holes of the filter screen are in an inverted frustum shape;
the coil pipe is communicated between the bottom of the primary water storage tank and the bottom of the secondary water storage tank, and the highest point of the coil pipe exceeds the bottom of the primary water storage tank and is set to be high.
In a second aspect, the present invention provides a hydrogen fuel cell humidification method, comprising the steps of:
in the working process of the hydrogen fuel cell, water generated by cathode reaction is collected in the primary water storage tank through the filter screen, and water exceeding a set liquid level flows into the secondary water storage tank through the serpentine pipe to be stored;
when water flow of cathode reaction passes through the inverted-truncated-cone-shaped filtering holes of the filter screen, a water film is formed on the inner wall of the filtering holes under the action of surface tension so as to keep the filter screen moist and preliminarily humidify the interior of the hydrogen fuel cell;
the ultrasonic humidifier in the primary water storage tank works, and the generated water mist enters the hydrogen fuel cell through the filter screen to humidify the hydrogen fuel cell for the second time.
The above one or more embodiments of the present invention achieve the following advantageous effects:
the water that the negative pole produced filters the hole after through the inverted circular truncated cone shape of filter screen, under the surface tension effect, forms the water film on the surface of filtering the hole, because the inside temperature of hydrogen fuel cell is higher, the water film can evaporate under the high temperature heating effect, to the inside preliminary humidification effect that produces of hydrogen fuel cell.
The rivers that the negative pole produced are collected in the one-level tank through the filter screen, and the water that surpasss to set for the liquid level can be through the snakelike pipe flow to the second grade tank of vertical setting in, through this kind of structure, can maintain the liquid level constancy in the one-level tank, sets up the supersound humidifier in the one-level tank for carry out the supersound humidification to hydrogen fuel cell inside.
Because the reaction of the hydrogen fuel cell is exothermic reaction, the temperature in the cell is higher, water in the primary water storage tank can absorb a large amount of heat, and meanwhile, the water absorbs heat and evaporates, so that the interior of the cell can be humidified, the evaporation of water on a proton exchange membrane can be inhibited, and the humidity balance of the hydrogen fuel cell is kept.
Through above two-stage humidification effect to guarantee that the inside humidity of hydrogen fuel cell is up to standard, reasonable control hydrogen fuel cell proton exchange membrane humidity improves the efficiency that the ion passes through proton exchange membrane, and then guarantees its steady operation, and reasonable control catalyst activity improves hydrogen fuel cell's generating efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a hydrogen fuel cell humidification system according to one or more embodiments of the present invention;
FIG. 2 is a schematic illustration of a control principle according to one or more embodiments of the present invention;
FIG. 3 is a schematic diagram of a multichannel tube configuration according to one or more embodiments of the present invention;
fig. 4 is a schematic structural view of a hydrogen humidifier according to one or more embodiments of the present invention;
FIG. 5 is a schematic diagram of a hydrogen fuel cell filter screen according to one or more embodiments of the present invention;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
the system comprises a proton exchange membrane 1, a hydrogen fuel cell cathode 2, a filter screen 3, an ultrasonic humidifier 4, a coiled pipe 5, a primary water storage tank 6, a secondary water storage tank 7, an electric valve 8, a water pump 9, a multichannel pipeline 10, a hydrogen fuel cell anode 11, a hydrogen humidifying nozzle 12, a humidity sensor 13, a control center 14 and a capillary pipeline 15.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In a first aspect, the present invention provides a humidification system for a hydrogen fuel cell, comprising a hydrogen fuel cell, a filter screen, a primary water storage tank, a coil and a secondary water storage tank, wherein,
the primary water storage tank is arranged below the hydrogen fuel cell, the primary water storage tank and the hydrogen fuel cell are sealed in the same shell, the filter screen is arranged between the primary water storage tank and the hydrogen fuel cell, and the ultrasonic humidifier is arranged in the primary water storage tank;
the filtering holes of the filtering net are in an inverted frustum shape;
the coil pipe is communicated between the bottom of the primary water storage tank and the bottom of the secondary water storage tank, and the highest point of the coil pipe exceeds the bottom of the primary water storage tank and is set to be high.
In some embodiments, the diameter of the large diameter end of the inverted frustum shaped filter hole is 1-1.5mm, and the ratio of the diameter of the large diameter end to the diameter of the small diameter end is 1.5-3. The inner wall surface of the filter hole of the arrangement mode is easier to form a water film, and a better humidification effect can be achieved for the inside of the hydrogen fuel cell.
Preferably, the thickness of the filter screen is 10-30 mm.
In some embodiments, the secondary water storage tank is provided with a drain hole on the side wall. When the water level in the secondary water storage tank is higher, part of water can be drained.
In some embodiments, the hydrogen humidifying device further comprises a hydrogen humidifying module, wherein the hydrogen humidifying module comprises a pump, a gas-liquid mixing device and a hydrogen humidifying sprayer;
the pump is communicated with the gas-liquid mixing device and the secondary water storage tank, and the gas-liquid mixing device is connected with a hydrogen source;
the hydrogen humidifying nozzle is arranged at the anode of the hydrogen fuel cell and is connected with the gas-liquid mixing device.
Preferably, the gas-liquid mixing device comprises a plurality of hydrogen branch pipelines and a water main pipeline, the hydrogen branch pipelines are connected with a hydrogen source, the hydrogen branch pipelines are obliquely communicated with the water main pipeline, and an included angle between the flow direction of the hydrogen and the flow direction of the water is 5-85 degrees, preferably 10-70 degrees.
The hydrogen branch pipe is inclined for the water main pipeline and is set up, and the flow direction of hydrogen and water is unanimous, pours hydrogen into aquatic into to pour into aquatic into through a plurality of hydrogen branch pipes into, can effectively improve the humidification efficiency to hydrogen.
Further preferably, the plurality of hydrogen branch pipes are spirally arranged along the main water pipe. The hydrogen branch pipelines are arranged at different positions of the water main pipeline, so that the contact area of hydrogen and water can be effectively increased, and the humidifying effect of the hydrogen is improved.
Preferably, a plurality of capillary pipelines are arranged in the hydrogen humidifying nozzle, and the tail ends of the capillary pipelines are of reducing structures to form a nozzle of the hydrogen humidifying nozzle;
the capillary channels are communicated with each other through fine pore passages.
More preferably, the ratio of the inner diameter of the capillary channel body to the inner diameter of the reducing structure is 1:0.4-0.8, preferably 1: 0.4-0.6.
A plurality of capillary pipelines are arranged in the hydrogen humidifying sprayer, water mixed with hydrogen enters the capillary pipelines, and the diameter of the sprayer at the tail end of the capillary pipeline is about 1/2 of the diameter of the capillary pipeline, so that the pressure in the capillary pipeline is large. The capillary pipelines are connected with each other through the fine pore passages, so that the pressure between the capillary pipelines can be balanced, meanwhile, the pressure difference between the capillary pipelines can also enhance the circulation of hydrogen between the capillary pipelines, the contact area of the hydrogen and water is further increased, and the humidification of the hydrogen is promoted.
In some embodiments, a humidity sensor is disposed near the anode of the hydrogen fuel cell. Humidity transducer can detect hydrogen humidity and whether suitable, then feeds back detected signal to control center, and control center judges humidity whether suitable, and humidity crosses lowly then improves water pump power, and humidity is too high then reduces water pump power. Through the setting mode, automatic control is realized, the working stability of the hydrogen fuel cell can be effectively improved, and the working efficiency of the hydrogen fuel cell is effectively improved.
In a second aspect, the present invention provides a hydrogen fuel cell humidification method, comprising the steps of:
in the working process of the hydrogen fuel cell, water generated by cathode reaction is collected in the primary water storage tank through the filter screen, and water exceeding a set liquid level flows into the secondary water storage tank through the serpentine pipe to be stored;
when water flow of cathode reaction passes through the inverted-truncated-cone-shaped filtering holes of the filter screen, a water film is formed on the inner wall of the filtering holes under the action of surface tension so as to keep the filter screen moist and preliminarily humidify the interior of the hydrogen fuel cell;
the ultrasonic humidifier in the primary water storage tank works, and the generated water mist enters the hydrogen fuel cell through the filter screen to carry out secondary humidification on the hydrogen fuel cell.
In some embodiments, water in the secondary water storage tank is pumped into the main water pipe, and hydrogen is injected into the main water pipe by the multiple hydrogen branch pipes and is fully contacted with the water, so that primary hydrogen humidification is performed.
Preferably, the gas-liquid mixture subjected to primary humidification is conveyed to the hydrogen humidification nozzle and enters the capillary pipelines inside the nozzle, and under the pressurization effect of the tail end reducing structure, hydrogen can mutually circulate through the fine pore passages connected between the capillary pipelines to further humidify the hydrogen.
If the liquid content in the gas-liquid mixture sprayed by the hydrogen humidifying spray head is high, the redundant water can flow into the lower primary water storage tank through the filter screen to be stored.
As described in the background art, the proton exchange membrane of the hydrogen fuel cell needs a proper humidity to exert the maximum power generation efficiency, otherwise, the service life of the proton exchange membrane is affected, and changing the humidity of the hydrogen input into the fuel cell is a way to adjust the proton exchange membrane.
As shown in fig. 1, there is provided a humidification system for a hydrogen fuel cell, comprising a hydrogen fuel cell, a filter 3, a primary water storage 6, a serpentine 5 and a secondary water storage 7, wherein,
the primary water storage tank 6 is arranged below the hydrogen fuel cell, the primary water storage tank and the hydrogen fuel cell are sealed in the same shell, the filter screen 3 is arranged between the primary water storage tank and the hydrogen fuel cell, and the ultrasonic humidifier 4 is arranged in the primary water storage tank 6;
the filtering holes of the filtering net 3 are in an inverted circular truncated cone shape, the diameter of the large-diameter end of the inverted circular truncated cone-shaped filtering holes is 1-1.5mm, the diameter ratio of the large-diameter end to the small-diameter end is 2, and the thickness of the filtering net 3 is 15 mm.
The coil pipe 5 is communicated between the bottom of the primary water storage tank 6 and the secondary water storage tank 7, and the highest point of the coil pipe 5 exceeds the bottom of the primary water storage tank 6 and is set to be high.
And a drain hole is formed in the side wall of the secondary water storage tank 7, a drainage pipeline is installed on the drain hole, and an electric valve is arranged on the drainage pipeline. When the water level in the water tank is high, part of water can be drained. Can set up level sensor in second grade tank 7, level sensor and electric valve all with control center signal connection, when the liquid level reached the liquid level upper limit, control center control electric valve opened automatically, arrange unnecessary water outward.
The hydrogen humidifying module comprises a pump, a gas-liquid mixing device and a hydrogen humidifying spray head 12, the pump is communicated with the gas-liquid mixing device and the secondary water storage tank 7, the gas-liquid mixing device is connected with a hydrogen source, and the hydrogen humidifying spray head 12 is arranged at the anode of the hydrogen fuel cell and is connected with the gas-liquid mixing device. The gas-liquid mixing device comprises a plurality of hydrogen branch pipelines and a water main pipeline, the hydrogen branch pipelines are connected with a hydrogen source, the hydrogen branch pipelines are obliquely communicated with the water main pipeline, and the included angle between the hydrogen flowing direction and the water flowing direction is 65 degrees. The hydrogen branch pipeline is spirally arranged along the water main pipeline.
A plurality of capillary pipelines 15 are arranged in the hydrogen humidifying sprayer, the tail ends of the capillary pipelines 15 are of reducing structures to form a nozzle of the hydrogen humidifying sprayer, and the front ends of the capillary pipelines are communicated with an inlet pipeline of the hydrogen humidifier; the capillary pipelines are mutually communicated through the small pore canal with the inner diameter of 0.3mm, and the inner diameter ratio of the capillary pipeline body to the reducing structure is 1: 0.5.
A humidity sensor 13 is provided near the anode of the hydrogen fuel cell.
The hydrogen fuel cell drainage humidifying device comprises a hydrogen fuel cell filter screen 3, wherein a filter hole inlet hole of the filter screen 3 is large, and a filter hole outlet hole is small, so that a circular truncated cone structure is formed. The filter screen of the hydrogen fuel cell utilizes the surface tension principle of liquid, water passing through the filter screen can not completely flow into the water storage tank, but forms a water film at an outlet, so that the filter screen can be kept moist, and the effect of keeping the interior of the hydrogen fuel cell moist is achieved.
The hydrogen fuel cell filter screen mainly supports the proton exchange membrane 1, filters water generated by the cathode 2 of the hydrogen fuel cell, and the filtered water enters the lower primary water storage tank 6. The one-level tank can carry out the humidification to proton exchange membrane through the mode that sets up ultrasonic humidifier 4, and when the one-level tank water level reachd the height of coiled pipe 5, the water of one-level tank gets into second grade tank 7 through the coiled pipe, the second grade tank can be stored water, and in the storage water arrival early warning scope in the second grade tank, electric valve 8 will be opened and carry out drainage work.
Water stored in the secondary water storage tank enters the multi-channel pipeline 10 under the action of the water pump 9, and the multi-channel pipeline can humidify multiple strands of hydrogen coming from different directions, so that the humidifying efficiency of the hydrogen is greatly improved. The preliminarily humidified hydrogen gas reaches the hydrogen humidifying nozzle 12 and is then injected into the hydrogen fuel cell anode 11.
The inlet of the hydrogen humidifier is connected with a multi-channel pipeline, and the tail end of the hydrogen humidifier is provided with a plurality of capillary pipelines 15, and water mixed with hydrogen enters the capillary pipelines. The diameter of the capillary channel end spray head is 1/2 the diameter of the capillary channel, resulting in a greater pressure within the capillary channel. Because the capillary pipelines are connected with each other through the fine pore passages, the pressure among the capillary pipelines can be balanced, and meanwhile, the hydrogen circulation among the capillary pipelines can be enhanced by the pressure difference among the capillary pipelines.
Meanwhile, the humidity sensor 13 detects the humidity of the hydrogen fuel cell, a detection electric signal is transmitted to the hydrogen fuel cell control center 14, and the control center controls the running power of the water pump according to the numerical value detected by the humidity sensor, so that the purpose of controlling the humidity of the hydrogen in the hydrogen fuel cell is achieved.
The water pump adopts a direct current motor, and the motor is connected with the control center through a motor driving module.
When the value measured by the humidity sensor reaches the maximum humidity, the control center controls the water pump to stop running, the ultrasonic humidifier stops running, the control center gives an alarm, and the control center controls the running power of the water pump through the real-time feedback of the humidity sensor, so that the purpose of controlling the humidity of the hydrogen in the hydrogen fuel cell is achieved. When the humidity measured by the humidity sensor is smaller, the ultrasonic humidifier continues to work, and the running power of the water pump is controlled to be improved, so that the humidity in the hydrogen fuel cell is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A hydrogen fuel cell humidification system characterized by: comprises a hydrogen fuel cell, a filter screen, a primary water storage tank, a coiled pipe and a secondary water storage tank, wherein,
the primary water storage tank is arranged below the hydrogen fuel cell, the primary water storage tank and the hydrogen fuel cell are sealed in the same shell, the filter screen is arranged between the primary water storage tank and the hydrogen fuel cell, and the ultrasonic humidifier is arranged in the primary water storage tank;
the filtering holes of the filter screen are in an inverted frustum shape;
the coil pipe is communicated between the bottom of the primary water storage tank and the secondary water storage tank, and the highest point of the coil pipe exceeds the bottom of the primary water storage tank by a set height;
the hydrogen humidifying module comprises a pump, a gas-liquid mixing device and a hydrogen humidifying spray head;
the pump is communicated with the gas-liquid mixing device and the secondary water storage tank, and the gas-liquid mixing device is connected with a hydrogen source; the hydrogen humidifying nozzle is arranged at the anode of the hydrogen fuel cell and is connected with the gas-liquid mixing device;
a plurality of capillary pipelines are arranged in the hydrogen humidifying sprayer, and the tail ends of the capillary pipelines are of reducing structures to form a nozzle of the hydrogen humidifying sprayer; the capillary channels are communicated with each other through fine pore passages.
2. The hydrogen fuel cell humidification system of claim 1, wherein: the diameter of the large-diameter end of the inverted frustum-shaped filtering hole is 1-1.5mm, and the diameter ratio of the large-diameter end to the small-diameter end is 1.5-3.
3. The hydrogen fuel cell humidification system of claim 1, wherein: the thickness of the filter screen is 10-30 mm.
4. The hydrogen fuel cell humidification system of claim 1, wherein: and a drain hole is formed in the side wall of the secondary water storage tank.
5. The hydrogen fuel cell humidification system of claim 1, wherein: the gas-liquid mixing device comprises a plurality of hydrogen branch pipelines and a water main pipeline, the hydrogen branch pipelines are connected with a hydrogen source, the hydrogen branch pipelines are obliquely communicated with the water main pipeline, and an included angle between the flowing direction of the hydrogen and the flowing direction of the water is 5-85 degrees.
6. The hydrogen fuel cell humidification system of claim 1, wherein: the included angle between the flow direction of the hydrogen and the flow direction of the water is 10-70 degrees.
7. The hydrogen fuel cell humidification system of claim 6, wherein: the hydrogen branch pipelines are spirally arranged along the water main pipeline.
8. The hydrogen fuel cell humidification system of claim 1, wherein: the inner diameter ratio of the capillary pipeline body to the reducing structure is 1: 0.4-0.8.
9. The hydrogen fuel cell humidification system according to claim 8, wherein: the inner diameter ratio of the capillary pipeline body to the reducing structure is 1: 0.4-0.6.
10. The hydrogen fuel cell humidification system according to claim 1, characterized in that: a humidity sensor is provided near the anode of the hydrogen fuel cell.
11. A hydrogen fuel cell humidification method using the hydrogen fuel cell humidification system as described in any one of claims 1 to 10, characterized in that: the method comprises the following steps:
in the working process of the hydrogen fuel cell, water generated by cathode reaction is collected in the primary water storage tank through the filter screen, and water exceeding a set liquid level flows into the secondary water storage tank through the serpentine pipe to be stored;
when water flow of cathode reaction passes through the inverted-truncated-cone-shaped filtering holes of the filter screen, a water film is formed on the inner wall of the filtering holes under the action of surface tension so as to keep the filter screen moist and preliminarily humidify the interior of the hydrogen fuel cell;
the ultrasonic humidifier in the primary water storage tank works, and the generated water mist enters the hydrogen fuel cell through the filter screen to carry out secondary humidification on the hydrogen fuel cell.
12. The hydrogen fuel cell humidification method according to claim 11, characterized in that: pumping water in the secondary water storage tank into a main water pipeline, injecting hydrogen into the main water pipeline through a plurality of branch hydrogen pipelines, and fully contacting with the branch hydrogen to perform primary hydrogen humidification;
the gas-liquid mixture after the primary humidification is conveyed to the hydrogen humidification nozzle and enters the capillary pipeline inside the nozzle, and under the pressurization effect of the tail end reducing structure, the hydrogen can mutually circulate through the fine pore passages connected between the capillary pipelines to further humidify the hydrogen.
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| JP5189719B2 (en) * | 2001-01-22 | 2013-04-24 | 本田技研工業株式会社 | Fuel cell system |
| JP5223469B2 (en) * | 2008-06-04 | 2013-06-26 | トヨタ紡織株式会社 | Fuel cell system |
| WO2019050959A1 (en) * | 2017-09-05 | 2019-03-14 | Intelligent Energy Inc. | Compact efficient hydrogen reactor |
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| CN109986965A (en) * | 2019-02-18 | 2019-07-09 | 德州新动能铁塔发电有限公司 | Pass through the caravan of water hydrogen power generation energy supply |
| CN111129553A (en) * | 2020-01-07 | 2020-05-08 | 合肥威尔燃油系统股份有限公司北京分公司 | Water separator of hydrogen fuel cell tail gas circulation system |
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| EP3937285A1 (en) * | 2020-07-08 | 2022-01-12 | Siemens Mobility GmbH | Method for operating a fuel cell system in a train |
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